1,1,1-Trichloroethane

Doylestown Borough Water Department

1,1,1-Trichloroethane is a solvent and a degreasing agent used for manufacturing metal products and as ingredient in cleaners and aerosols. Exposure to 1,1,1-trichloroethane can harm the nervous system, liver and circulatory system.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	ND	5	0	ND
2015	0.180 ppb	5	1	ND - 0.900 ppb
2016	ND	5	0	ND
2017	0.140 ppb	5	1	ND - 0.700 ppb
2018	0.120 ppb	5	1	ND - 0.600 ppb
2019	ND	5	0	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 200 ppb

The legal limit for 1,1,1-trichloroethane, established in 1987, was based on toxicity studies conducted in laboratory animals in the 1970s and 1980s.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-01-22	L4867559-1	ND
2014-01-22	L4867559-2	ND
2014-02-25	L4899027-2	ND
2014-02-25	L4899027-3	ND
2014-02-25	L4899027-1	ND
2015-01-13	12274557	ND
2015-01-13	12274611	0.900 ppb
2015-02-03	12389840	ND
2015-02-03	12389894	ND
2015-02-03	12389948	ND
2016-02-05	13858697	ND
2016-02-05	13858751	ND
2016-02-05	13858589	ND
2016-02-05	13858643	ND
2016-02-05	13858535	ND
2017-01-06	15503086	ND
2017-01-06	15502928	ND
2017-01-06	15502980	0.700 ppb
2017-01-06	15503138	ND
2017-01-06	15503034	ND
2018-01-12	L6983060-3	ND
2018-01-12	L6983058-2	0.600 ppb
2018-01-12	L6983060-2	ND
2018-01-12	L6983058-1	ND
2018-01-12	L6983060-1	ND
2019-01-31	L7090358-2	ND
2019-01-31	L7090359-1	ND
2019-01-31	L7090359-2	ND
2019-01-31	L7090358-3	ND
2019-01-31	L7090358-1	ND